Binder



FIG. 1 is a top plan view of my new binder, the binder being in a fully opened condition, with loose-leaf paper, pencils and a calculator being shown in phantom for illustrative purposes only and forming no part of the claimed design;

FIG. 2 is a bottom plan view thereof, the broken lines showing a rectangular feature on the lower right corner are for illustrative purposes only and form no part of the claimed design;

FIG. 3 is a front elevational view thereof, the undisclosed rear being a mirror image; and,

FIG. 4 is a left side elevational view thereof, the undisclosed right side elevational view being a mirror image. 

The ornamental design for a binder, as shown and described. 